1143897895 has 48 divisors (see below), whose sum is σ = 1665813600. Its totient is φ = 750946560.

The previous prime is 1143897877. The next prime is 1143897913. The reversal of 1143897895 is 5987983411.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1143897877) and next prime (1143897913).

It is not a de Polignac number, because 1143897895 - 2⁹ = 1143897383 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 930141 + ... + 931369.

It is an arithmetic number, because the mean of its divisors is an integer number (34704450).

Almost surely, 2^1143897895 is an apocalyptic number.

1143897895 is a deficient number, since it is larger than the sum of its proper divisors (521915705).

1143897895 is a wasteful number, since it uses less digits than its factorization.

1143897895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408 (or 1401 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 55.

The square root of 1143897895 is about 33821.5596180898. The cubic root of 1143897895 is about 1045.8331900481.

The spelling of 1143897895 in words is "one billion, one hundred forty-three million, eight hundred ninety-seven thousand, eight hundred ninety-five".